Freelance-Senior Cybersecurity Incident Response Specialist-L3

4 weeks ago

Bareilly, Uttar Pradesh, India ThreatXIntel Full time

Company Description

ThreatXIntel is a startup cybersecurity company dedicated to protecting businesses and organizations from cyber threats. We offer a range of services including cloud security, web and mobile security testing, cloud security assessment, and DevSecOps. Our customized, affordable solutions cater to the specific needs of our clients, regardless of the size of their business. ThreatXIntel takes a proactive approach to security by continuously monitoring and testing clients' digital environments to identify vulnerabilities before they can be exploited.

Role Description

We are seeking an experienced freelance cybersecurity expert to take on a Senior Incident Response Specialist role. This freelance engagement is ideal for a highly technical professional who thrives in dynamic environments, is comfortable leading complex incident investigations, and enjoys contributing to the continuous improvement of cybersecurity operations.

What You'll Do:

  • Analyze and respond to advanced security incidents across enterprise systems.
  • Investigate alerts from SOC tools such as SIEM, EDR, IDS/IPS, and log aggregators.
  • Perform digital forensics, malware triage, and root cause analysis.
  • Lead containment, eradication, and recovery efforts during high-severity incidents.
  • Produce clear and actionable incident reports with executive summaries and technical deep-dives.
  • Mentor junior analysts, helping upskill the SOC team through guidance and reviews.
  • Create and optimize detection rules, correlation logic, and countermeasures.
  • Map threat activity to MITRE ATT&CK and integrate relevant threat intelligence (IOC, TTP).
  • Identify detection coverage gaps and suggest improvements.
  • Contribute to playbook development, tuning, and SOC process enhancements.

Core Technical Requirements:

  • 7+ years in SOC/CSIRT/SIRT roles with enterprise cybersecurity exposure.
  • Proficient in analyzing alerts/logs from Windows, Linux, network infrastructure, and EDR platforms.
  • Experience with SIEM (Splunk, QRadar, ELK, etc.) and EDR tools (CrowdStrike, SentinelOne, Defender, etc.).
  • In-depth understanding of APT, cybercrime techniques, and threat actor behavior.
  • Strong familiarity with MITRE ATT&CK, Cyber Kill Chain, and NIST CSF.
  • Hands-on scripting in PowerShell, Python, Bash, or PERL.
  • Experience in malware analysis, digital forensics, and secure evidence handling.
  • Strong understanding of authentication mechanisms, network protocols, and cryptographic systems.
  • Ability to triage, investigate, and lead complex incidents independently.

Certifications (At Least One Required):

  • GCIH (GIAC Certified Incident Handler)
  • GCIA (GIAC Certified Intrusion Analyst)
  • CISSP
  • OSCP, GNFA, or CHFI

Nice to Have:

  • Exposure to threat hunting, purple teaming, or OT/ICS environments
  • Experience contributing to SOC playbooks and process improvement
  • Familiarity with SOAR, UEBA, or sandboxing tools
  • Additional certifications: Linux+, CCNA/CCNP, GCFA
  • Experience writing executive-level sitreps and technical documentation

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